Sleeve mine single hydraulic prop

The utility model relates to a sleeve type mining single hydraulic prop, consisting of a top cover, a movable column body, a cylinder body, a handle body and a three-used-valve. The utility model is characterized in that the sleeve structure is adopted and O-rings and block ring seals are arranged at a plurality of positions, thus effectively preventing leakage caused by inner corrosion of the cylinder. The advantage is that water can be taken as medium instead of emulsion, thereby reducing production cost of coal mine and preventing environmental pollution, being an ideal sleeve type mining single hydraulic prop.